Oracle分页存储过程
1、在oracle的sqlplus或其他工具中运行一下pl/sql块建立存储过程
--创建包
create or replace package testpackage as
type test_cursor is ref cursor;
end testpackage;
/
--创建过程
create or replace procedure fenye
(
tableName in varchar2, --表名
fields in varchar2, --查询解果显示字段
wherecase in varchar2, --查询条件
pageSize in number, --一页显示记录数
pageNow in number, --当前页
orderField varchar2, --排序字段，为空表示不排序
orderFlag number, --排序标识 0：正序 1：倒序
myrows out number, --总记录数
myPageCount out number, --总分页
p_cursor out testpackage.test_cursor --返回的记录集
) is
--定义部分
--定义sql语句字符串
v_sql varchar2(1000);
--定义两个整数
v_begin number:=(pageNow-1)*pagesize+1; --开始记录
v_end number:=pageNow*pageSize; --结束记录
--排序sql
v_orderSql varchar2(100):='';
v_wherecase varchar2(100):='';
begin
--执行部分
--如果orderField不为空，则进行排序，如果orderFlag=0为升序，1为降序
if orderField is not null then
if orderFlag=0 then
v_orderSql:=' order by '||orderField;
elsif orderFlag=1 then
v_orderSql:=' order by '||orderField||' desc';
else
null;
end if;
end if;
--条件判断语句
if wherecase is not null then
v_wherecase:=' where '||wherecase;
end if;
v_sql:='select * from
(select t1.* ,rownum rn from(select '|| fields ||' from '|| tableName|| v_wherecase ||' '||v_orderSql ||') t1 where rownum<='|| v_end ||')
where rn>='|| v_begin;
--把游标和sql关联
open p_cursor for v_sql;
--计算myrows和myPageCount
--组织一个sql
v_sql:='select count(*) from '|| tableName || v_wherecase || ' ' ||v_orderSql;
--执行sql,并把返回的值赋给myrows;
execute immediate v_sql into myrows;
--计算myPageCount
if mod(myrows,Pagesize)=0 then
myPageCount:=myrows/Pagesize;
else
myPageCount:=myrows/pagesize+1;
end if;
--关闭游标
--close p_cursor;
end;
/
2、.net中的oracle过程调用类
/// <summary>
/// c#调用oracle的过程进行分页
/// author:sirc_ljp
/// date:2011.11.16
/// </summary>
public class Paging
{
private string _connectionString;
private string _tableName;
private string _fields = "*";
private string _whercase="";
private int _pageSize=10;
private int _pageNow=1;
private string _orderField="";
private int _orderFlag = 0;
private int _myRows;
private int _myPageCount;
private DataTable _result;
/// <summary>
/// 数据库连接字符串
/// </summary>
public string ConnectionString
{
get { return _connectionString; }
set { _connectionString = value; }
}
/// <summary>
/// 表名
/// </summary>
public string TableName
{
get { return _tableName; }
set { _tableName = value; }
}
/// <summary>
/// 查询结果显示字段
/// </summary>
public string Fields
{
get { return _fields; }
set { _fields = value; }
}
/// <summary>
/// 查询条件
/// </summary>
public string Whercase
{
get { return _whercase; }
set { _whercase = value; }
}
/// <summary>
/// 页显示记录数
/// </summary>
public int PageSize
{
get { return _pageSize; }
set { _pageSize = value; }
}
/// <summary>
/// 当前页
/// </summary>
public int PageNow
{
get { return _pageNow; }
set { _pageNow = value; }
}
/// <summary>
/// 排序字段，为空""表示不排序
/// </summary>
public string OrderField
{
get { return _orderField; }
set { _orderField = value; }
}
/// <summary>
/// 排序标识 0：正序 1：倒序
/// </summary>
public int OrderFlag
{
get { return _orderFlag; }
set { _orderFlag = value; }
}
/// <summary>
/// 总记录数
/// </summary>
public int MyRows
{
get { return _myRows; }
}
/// <summary>
/// 总分页
/// </summary>
public int MyPageCount
{
get { return _myPageCount; }
}
/// <summary>
/// 返回的记录集
/// </summary>
public DataTable Result
{
get { return _result; }
}
public Paging()
{
fenye();
}
public Paging(string connectionString,string tableName, string fields, string wherecase, int pageSize, int pageNow, string orderField, int orderFlag, out int myRows, out int myPageCount, out DataTable result)
{
_connectionString = connectionString;
_tableName = tableName;
_fields = fields;
_whercase = wherecase;
_pageSize = pageSize;
_pageNow = pageNow;
_orderField = orderField;
_orderFlag = orderFlag;
fenye();
myRows = _myRows;
myPageCount = _myPageCount;
result = _result;
}
private void fenye()
{
OracleConnection conn = new OracleConnection(_connectionString);
conn.Open();
try
{
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.StoredProcedure;
//调用存储过程查询数据
cmd.CommandText = "fenye";
OracleParameter[] parameters = new OracleParameter[10];
//注意这里的参数名和类型号与存储过程里面的一样
parameters[0] = new OracleParameter("tableName", OracleType.VarChar);
parameters[1] = new OracleParameter("fields", OracleType.VarChar);
parameters[2] = new OracleParameter("wherecase", OracleType.VarChar);
parameters[3] = new OracleParameter("pageSize", OracleType.Int32);
parameters[4] = new OracleParameter("pageNow", OracleType.Int32);
parameters[5] = new OracleParameter("orderField", OracleType.VarChar);
parameters[6] = new OracleParameter("orderFlag", OracleType.Int32);
parameters[7] = new OracleParameter("myrows", OracleType.Int32);
parameters[8] = new OracleParameter("myPageCount", OracleType.Int32);
parameters[9] = new OracleParameter("p_cursor", OracleType.Cursor);
parameters[0].Value = _tableName;
parameters[1].Value = _fields;
parameters[2].Value = _whercase;
parameters[3].Value = _pageSize;
parameters[4].Value = _pageNow;
parameters[5].Value = _orderField;
parameters[6].Value = _orderFlag;
parameters[7].Direction = ParameterDirection.Output;
parameters[8].Direction = ParameterDirection.Output;
parameters[9].Direction = ParameterDirection.Output;
foreach (OracleParameter parameter in parameters)
{
cmd.Parameters.Add(parameter);
}
//执行命令
OracleDataAdapter oda = new OracleDataAdapter(cmd);
DataSet ds = new DataSet();
oda.Fill(ds);
//得到查询结果表
_result = ds.Tables[0];
//取出总行数
_myRows = Convert.ToInt32(parameters[7].Value);
//取出总页数
_myPageCount = Convert.ToInt32(parameters[8].Value.ToString());
}
catch (Exception ex)
{
throw;
}
finally
{
conn.Close();
}
}
}